Wheel offset means how the centerline of the wheel is positioned in relation to its width.
So it does not depend solely on the offset check also the wheel width and intended tire size.
+ positive offset means papasok sa wheel well ang gulong.
- negative offset means palabas sa wheel well ang gulong.
Here's an example:
18x9, 0 offset wheel
Notice how flush the wheels are? I tried measuring the limits of the biggest tire I can install without lift. 265-60-18. More than that and I will definitely have rubbing issues that can be solved by trimming parts of the fender liner and mudguard.
For more info regarding wheel offset, pls read this link:
Wheel Offset Explained | Wheel Offset Guide | Discount Tire